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What is forking in bash?
When a command or the shell itself initiates (or spawns) a new subprocess to carry out a task, this is called forking. This new process is the child, and the process that forked it off is the parent. While the child process is doing its work, the parent process is still executing.
What does forking do in Linux?
The fork() System Call. System call fork() is used to create processes. It takes no arguments and returns a process ID. The purpose of fork() is to create a new process, which becomes the child process of the caller.
How to do multithreading in Bash Stack Overflow?
You can execute a command in background with the & suffix. You can wait for completion of a background command with the wait command. You can execute multiple commands in parallel by separating them with |. This provides also a synchronization mechanism, since stdout of a command at left of | is connected to stdin of command at right.
Is there way to execute multiple commands in parallel in Bash?
Bash job control involves multiple processes, not multiple threads. You can execute a command in background with the & suffix. You can wait for completion of a background command with the wait command. You can execute multiple commands in parallel by separating them with |.
Can a bash script run in multiple processes?
Each command will run in a separate process, so it’s technically not “multithreading”, but I believe it solves your problem. You can run several copies of your script in parallel, each copy for different input data, e.g. to process all *.cfg files on 4 cores: Bash job control involves multiple processes, not multiple threads.
Why does multi-threaded scripting almost always increase the performance of your scripts?
Why multi-threaded coding almost always can and will increase the performance of your scripts When you execute a Bash script, it will at maximum use a single CPU thread, unless you start subshells/threads. If your machine has at least two CPU threads, you will be able to max-out CPU resources using multi-threaded scripting in Bash.